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Code Issues Releases Wiki Activity

can: af_can: can_exit(): add missing dev_remove_pack() of canxl_packet

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In can_init(), dev_add_pack(&canxl_packet) is added but not removed in
can_exit(). It breaks the packet handler list and can make kernel
panic when can_init() is called for the second time.

| > modprobe can && rmmod can
| > rmmod xxx && modprobe can
|
| BUG: unable to handle page fault for address: fffffbfff807d7f4
| RIP: 0010:dev_add_pack+0x133/0x1f0
| Call Trace:
|  <TASK>
|  can_init+0xaa/0x1000 [can]
|  do_one_initcall+0xd3/0x4e0
|  ...

Fixes: fb08cba12b ("can: canxl: update CAN infrastructure for CAN XL frames")
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://lore.kernel.org/all/20221031033053.37849-1-chenzhongjin@huawei.com
[mkl: adjust subject and commit message]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Chen Zhongjin 2022-10-31 11:30:53 +08:00 committed by Marc Kleine-Budde
parent c23fb2c822
commit a3335faebe
1 changed files with 1 additions and 0 deletions
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1
net/can/af_can.c
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@ -902,6 +902,7 @@ static __init int can_init(void)
static __exit void can_exit(void)
{
/* protocol unregister */
dev_remove_pack(&canxl_packet);
dev_remove_pack(&canfd_packet);
dev_remove_pack(&can_packet);
sock_unregister(PF_CAN);